Added GrGLFragmentProcessor::EmitArgs struct for use with emitCode()

src/gpu/effects/GrMatrixConvolutionEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrMatrixConvolutionEffect.h"
 #include "gl/GrGLFragmentProcessor.h"
 #include "gl/GrGLTexture.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 
 class GrGLMatrixConvolutionEffect : public GrGLFragmentProcessor {
 public:
     GrGLMatrixConvolutionEffect(const GrProcessor&);
-    virtual void emitCode(GrGLFPBuilder*,
-                          const GrFragmentProcessor&,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*);
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
 private:
     typedef GrGLProgramDataManager::UniformHandle UniformHandle;
     SkISize                     fKernelSize;
     bool                        fConvolveAlpha;
 
     UniformHandle               fKernelUni;
     UniformHandle               fImageIncrementUni;
     UniformHandle               fKernelOffsetUni;
     UniformHandle               fGainUni;
     UniformHandle               fBiasUni;
     GrTextureDomain::GLDomain   fDomain;
 
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GrGLMatrixConvolutionEffect::GrGLMatrixConvolutionEffect(const GrProcessor& processor) {
     const GrMatrixConvolutionEffect& m = processor.cast<GrMatrixConvolutionEffect>();
     fKernelSize = m.kernelSize();
     fConvolveAlpha = m.convolveAlpha();
 }
 
-void GrGLMatrixConvolutionEffect::emitCode(GrGLFPBuilder* builder,
-                                           const GrFragmentProcessor& fp,
-                                           const char* outputColor,
-                                           const char* inputColor,
-                                           const TransformedCoordsArray& coords,
-                                           const TextureSamplerArray& samplers) {
-    const GrTextureDomain& domain = fp.cast<GrMatrixConvolutionEffect>().domain();
-    fImageIncrementUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+void GrGLMatrixConvolutionEffect::emitCode(EmitArgs& args) {
+    const GrTextureDomain& domain = args.fFp.cast<GrMatrixConvolutionEffect>().domain();
+    fImageIncrementUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                              kVec2f_GrSLType, kDefault_GrSLPrecision,
                                              "ImageIncrement");
-    fKernelUni = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility,
+    fKernelUni = args.fBuilder->addUniformArray(GrGLProgramBuilder::kFragment_Visibility,
                                           kFloat_GrSLType, kDefault_GrSLPrecision,
                                           "Kernel",
                                           fKernelSize.width() * fKernelSize.height());
-    fKernelOffsetUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fKernelOffsetUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                            kVec2f_GrSLType, kDefault_GrSLPrecision, "KernelOffset");
-    fGainUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fGainUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                    kFloat_GrSLType, kDefault_GrSLPrecision, "Gain");
-    fBiasUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fBiasUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                    kFloat_GrSLType, kDefault_GrSLPrecision, "Bias");
 
-    const char* kernelOffset = builder->getUniformCStr(fKernelOffsetUni);
-    const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
-    const char* kernel = builder->getUniformCStr(fKernelUni);
-    const char* gain = builder->getUniformCStr(fGainUni);
-    const char* bias = builder->getUniformCStr(fBiasUni);
+    const char* kernelOffset = args.fBuilder->getUniformCStr(fKernelOffsetUni);
+    const char* imgInc = args.fBuilder->getUniformCStr(fImageIncrementUni);
+    const char* kernel = args.fBuilder->getUniformCStr(fKernelUni);
+    const char* gain = args.fBuilder->getUniformCStr(fGainUni);
+    const char* bias = args.fBuilder->getUniformCStr(fBiasUni);
     int kWidth = fKernelSize.width();
     int kHeight = fKernelSize.height();
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
-    SkString coords2D = fsBuilder->ensureFSCoords2D(coords, 0);
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
+    SkString coords2D = fsBuilder->ensureFSCoords2D(args.fCoords, 0);
     fsBuilder->codeAppend("vec4 sum = vec4(0, 0, 0, 0);");
     fsBuilder->codeAppendf("vec2 coord = %s - %s * %s;", coords2D.c_str(), kernelOffset,
                            imgInc);
     fsBuilder->codeAppend("vec4 c;");
 
     for (int y = 0; y < kHeight; y++) {
         for (int x = 0; x < kWidth; x++) {
             GrGLShaderBuilder::ShaderBlock block(fsBuilder);
             fsBuilder->codeAppendf("float k = %s[%d * %d + %d];", kernel, y, kWidth, x);
             SkString coord;
             coord.printf("coord + vec2(%d, %d) * %s", x, y, imgInc);
-            fDomain.sampleTexture(fsBuilder, domain, "c", coord, samplers[0]);
+            fDomain.sampleTexture(fsBuilder, domain, "c", coord, args.fSamplers[0]);
             if (!fConvolveAlpha) {
                 fsBuilder->codeAppend("c.rgb /= c.a;");
                 fsBuilder->codeAppend("c.rgb = clamp(c.rgb, 0.0, 1.0);");
             }
             fsBuilder->codeAppend("sum += c * k;");
         }
     }
     if (fConvolveAlpha) {
-        fsBuilder->codeAppendf("%s = sum * %s + %s;", outputColor, gain, bias);
+        fsBuilder->codeAppendf("%s = sum * %s + %s;", args.fOutputColor, gain, bias);
         fsBuilder->codeAppendf("%s.rgb = clamp(%s.rgb, 0.0, %s.a);",
-                               outputColor, outputColor, outputColor);
+                               args.fOutputColor, args.fOutputColor, args.fOutputColor);
     } else {
-        fDomain.sampleTexture(fsBuilder, domain, "c", coords2D, samplers[0]);
-        fsBuilder->codeAppendf("%s.a = c.a;", outputColor);
-        fsBuilder->codeAppendf("%s.rgb = sum.rgb * %s + %s;", outputColor, gain, bias);
-        fsBuilder->codeAppendf("%s.rgb *= %s.a;", outputColor, outputColor);
+        fDomain.sampleTexture(fsBuilder, domain, "c", coords2D, args.fSamplers[0]);
+        fsBuilder->codeAppendf("%s.a = c.a;", args.fOutputColor);
+        fsBuilder->codeAppendf("%s.rgb = sum.rgb * %s + %s;", args.fOutputColor, gain, bias);
+        fsBuilder->codeAppendf("%s.rgb *= %s.a;", args.fOutputColor, args.fOutputColor);
     }
 
     SkString modulate;
-    GrGLSLMulVarBy4f(&modulate, outputColor, inputColor);
+    GrGLSLMulVarBy4f(&modulate, args.fOutputColor, args.fInputColor);
     fsBuilder->codeAppend(modulate.c_str());
 }
 
 void GrGLMatrixConvolutionEffect::GenKey(const GrProcessor& processor,
                                          const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
     const GrMatrixConvolutionEffect& m = processor.cast<GrMatrixConvolutionEffect>();
     SkASSERT(m.kernelSize().width() <= 0x7FFF && m.kernelSize().height() <= 0xFFFF);
     uint32_t key = m.kernelSize().width() << 16 | m.kernelSize().height();
     key |= m.convolveAlpha() ? 1 << 31 : 0;
     b->add32(key);
@@ skipping 144 matching lines @@
                                              d->fTextures[texIdx],
                                              bounds,
                                              kernelSize,
                                              kernel.get(),
                                              gain,
                                              bias,
                                              kernelOffset,
                                              tileMode,
                                              convolveAlpha);
 }